I did a CTRL-R ( reload ) on a 30 seconds chart, it comes back very quickly.
Looking at uptick and downtick information, it seems that it does not refresh from Backfill as i can still see both uptick and downtick volume.

My understanding is that backfill does not differentiate uptick and downtick and does if backfill is successful, i should only see uptick volume.

When you're doing a reload, MultiCharts tries to use existing (pre-downloaded data).
If you want to be completely sure that the data is downloaded anew from the server, you'll need to open the symbol in QuoteManger, clear the cache and create the chart again.

But for 1 min charts, i don't have to do this to force a reload from IB backfill.

Are you saying for intervals not natively supported by IB... eg ticks, seconds and volume charts, i need to clear the cache to force a reload?

thanks

Alex Kramer wrote:When you're doing a reload, MultiCharts tries to use existing (pre-downloaded data).If you want to be completely sure that the data is downloaded anew from the server, you'll need to open the symbol in QuoteManger, clear the cache and create the chart again.

This has nothing to do with resolution. If you have problems with the chart, e.g. gaps, first try simply reloading the chart. It will make MultiCharts try to look up data for possible gaps and fille them up if possible.
If this does not help and there still are gaps, you need to clear ther cache for the symbol and reload, hoping that the data on the server is proper.